| LB膜的制膜条件优化及其对光学性能的影响 |
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| 引用本文： | 韩奎,吴玉喜,张丽萍,郭治天,张国营,陆兴泽,王文澄. LB膜的制膜条件优化及其对光学性能的影响[J]. 光子学报, 2002, 31(3): 328-331 |
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| 作者姓名： | 韩奎 吴玉喜 张丽萍 郭治天 张国营 陆兴泽 王文澄 |
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| 作者单位： | 中国矿业大学理学院物理科学与技术系,江苏,徐州,221008;复旦大学光科学与技术系,上海,200433 |
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| 基金项目： | 中国矿业大学博士科研启动基金资助项目 |
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| 摘 要： | 通过紫外-可见吸收光谱、二次谐波振荡和稳态荧光的测量,研究了半花菁(DAEP)Langmuir-Blodgett(LB)膜在不同制膜条件(压膜速度、半花菁和花生酸混合、亚相中加入碘离子)下,LB膜样品中半花菁分子的聚集体性质的改变和对非线性光学性能的影响.实验发现,纯半花菁LB膜中分子形成H-聚集体,从而导致吸收峰、荧光峰的蓝移和分子二阶非线性极化率β的减少.分子聚集程度的减少和分子二阶非线性系数β的增加可以通过增大压膜速度、半花菁和花生酸混合、亚相中加入碘离子等方法实现.
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| 关 键 词： | H-聚集体 半花菁 Langmuir-Blodgett膜 二次谐波振荡 |
| 收稿时间： | 2001-06-25 |
| 修稿时间： | 2001-06-25 |
THE OPTIMIZATION OF PREPARATION CONDITIONS AND ITS EFFECTS ON THE OPTICAL PROPERTIES OF LB FILMS |
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| Han Kui,Wu Yuxi,Zhang Liping,Guo Zhitian,Zhang Guoying Physics Department,Science College,China University of Mining & Technology,Xuzhou,Jiangsu Lu Xingze,Wang Wencheng Optical Science and Technology Department,Fudan University,Shanghai. THE OPTIMIZATION OF PREPARATION CONDITIONS AND ITS EFFECTS ON THE OPTICAL PROPERTIES OF LB FILMS[J]. Acta Photonica Sinica, 2002, 31(3): 328-331 |
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| Authors: | Han Kui Wu Yuxi Zhang Liping Guo Zhitian Zhang Guoying Physics Department Science College China University of Mining & Technology Xuzhou Jiangsu Lu Xingze Wang Wencheng Optical Science Technology Department Fudan University Shanghai |
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| Affiliation: | Han Kui,Wu Yuxi,Zhang Liping,Guo Zhitian,Zhang Guoying Physics Department,Science College,China University of Mining & Technology,Xuzhou,Jiangsu 221008 Lu Xingze,Wang Wencheng Optical Science and Technology Department,Fudan University,Shanghai 200433 |
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| Abstract: | Authors investigated the effects of different deposited conditions on the H-aggregation status and optical properties of hemicyanine LB films by UV-visible absorption spectroscopy,steady-state fluorescence spectroscopy and second harmonic generation measurements.DAEP molecules formed H-aggregation in LB films,characterized by a blue shift of the absorption band and fluorescence band relative to the monomeric spectra,leading to a reduction of the effective hyperpolarizability β due to the second harmonic off-resonant effect.The degree of H-aggregation in LB films could be reduced and β could be enhanced by raising the compressional speed and mixing with arachidic(AA) and adding I - in the subphase due to the dissociation of the H-aggregation in the LB films. |
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| Keywords: | H-aggregation Hemicyanine dye Langmuir-Blodgett films Second harmonic generation |
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